Chambers, Diane P., author
A Fireside Book, 1998
Buku Teks
Robin, ,Jennifer, author
Jossey-Bass, 2013
Buku Teks
Johnston, Trevor, author
Cambridge University Press, 2014
Buku Teks
Cleese, John
BBC Worldwide Limited, 2003
Multimedia
Elkin, A. P., author
Angus and Robertson, 1966
Buku Teks